Car ESCs typically are heavier due to the large heat sink needed. Also they are often limited to 2S LiPo
You do have to ensure yo disable the reverse function if the ESC has it... Airplanes generally don't do well if you turn the prop backward.

The motors can work fine for aircraft especially if you want a high rpm.

There are still a lot of brushed motors used n RC cars. At least one of the official racing classes specifies a brushed motor.